Meta Search Engines

What is Meta Search engine:

A Meta search engine is a search tool that doesn't create its own database of information, but instead searches those of other search engines. "Metacrawler", for instance, searches the databases of each of the following engines: Lycos, WebCrawler, Excite, AltaVista, and Yahoo. Using multiple databases will mean that the search results are more comprehensive, but slower to obtain.

Where metacrowler is a system that crawl the web by follow the link. There is some Meta search engine like: http://www.mamma.com/ (The Mother of all Search Engines), www.metacrowler.com etc

So in short way a search engine that gets listings from two or more other search engines, rather than through its own efforts.

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